APPENDIX E
CELP MODULE CONNECTOR PIN ASSIGNMENTS
TABLE 1. CELP VOICE CHANNEL MODULE CONNECTOR PIN ASSIGNMENTS,
CARD EDGE INTERFACE, P1
Pin No.
Signal Name
*Direction
Description
1
CHASSIS GROUND
2
AF ROW SEL
IN
When AF ROW SEL and AF COL SEL are both low, then RESP 1-4 are
enabled. During a write operation, data must be valid on the positive go-
ing edge.
3
–12 V dc
IN
Negative 12-volt power supply.
4
GROUND
Signal Ground.
5
+ 5 V dc
IN
Positive 5-volt power supply.
6
SYNC BUS
IN
High when in normal operation. Low indicates loss of mux channel syn-
chronization.
7
02 CLK BUS
IN
Not Used
8
RESP A/B
IN
Used as an address strobe to qualify the four RESP lines (Active Low).
9
01 CLK BUS
IN
Not Used
10
XC ROW SEL
When XC ROW SEL/XC COL SEL are low, loopback and alarm informa-
tion is placed on the WXYZ control buses.
11
D BUS
OUT
Output of drivers goes low to indicate a change of state in controls.
12
W BUS
BI
The direction of the W BUS is controlled by the transmit control selects.
13
Y BUS
BI
The direction of the Y BUS is controlled by the transmit control selects.
14
CB1
IN
The 1.024-MHz clock.
15
CB2
IN
The 921.6-kHz clock.
16
CB3
IN
Not Used
17
CB4
IN
Not Used
18
RESP 1
BI
RESP 1 is address input line A0 when RESP A/B is low. RESP1 is I/O
data line D0 when selected by AF ROW SEL and AF COL SEL both low.
19
RESP 2
BI
Corresponds to address line A1 and data line D1.
20
RESP 3
BI
Corresponds to address line A2 and data line D2.
21
RCV DATA BUS
IN
Receive aggregate data from the common TX/RX card.
22
—
No connection on Voice Channel Card
23
DISABLE
IN
Not Used
24
TIP OUT
OUT
Analog output. Part of the VF TIP and RING output pair.
25
RING OUT
OUT
Analog output. Part of the VF TIP and RING output pair.
26
—
No connection on Voice Channel Card
27
STATION BATTERY
(SB)
OUT
Provides a current limited station battery (–12 to –48 V dc sourced from
Pin 55) on the CELP VOICE CHANNEL MODULE base card when con-
figured for a Type II or III interface. For types I, IV or V, station ground
is provided on the SB lead.
* IN - Input — OUT - Output — BI - Bidirectional
E-1
